The first model of Datsun 240Z was made in 1969, the same year the Speedtimer was created.
In 1971, adorned with the Seiko logo, the Datsun 240Z with No.11 on its side conquered harsh terrain as it raced 6,200 kilometers to victory in the East-African Safari Rally, widely regarded as one of the toughest races in the world.
In 1969, Seiko introduced the Speedtimer, the world’s first automatic chronograph equipped with both a vertical clutch and a column wheel, two features that greatly enhanced the measurement of elapsed time.
Today, three limited-edition watches drawing on a range of Seiko technologies join the Speedtimer series, paying homage to the shared legacy of Seiko and Datsun 240Z and their advancements in the late 1960s and early 1970s.
DATSUN
It was a new brand-name born in 1932 at DAT Jidosha Seizo, the predecessor of Nissan Motor.
Originally, the brand “DAT” was founded under Kwaishinsha Motor Car Works, the predecessor of DAT Jidosha Seizo, and it was an acronym derived from the initials of three investors’ surnames. Later on, “SON” was applied to the end and became “DATSON” as it was the “son” they created. However, in Japanese “SON” is the word for “loss” therefore, it was immediately changed to “SUN,” which has brighter associations, and the name became DATSUN.
DATSUN 240Z
Launched in 1969, the Datsun 240Z became a worldwide hit, not only in Japan but also in North America.
With the aim of demonstrating its high performance as a sports car, the Datsun 240Z began to participate in world rally competitions.
Seiko, sharing Datsun’s spirit for taking on challenges, supported the Datsun 240Z in motorsports activities in the early 1970s.
Seiko Prospex Speedtimer
Mechanical
Datsun 240Z Limited Edition
Case / Strap
By operating the 4 o'clock crown, a countdown timer function can be used to measure key intervals in motorsports competitions, such as the time remaining before the start and target durations for tasks such as tire changes and refueling.
The leather strap is sourced from tanneries certified by the Leather Working Group, of which Seiko is a member. The seams on the inner sides of both of the leather strap is covered with lining to minimize damage from sweat and water.
*The Leather Working Group (LWG) is a non-profit organization dedicated to responsible and sustainable leather production. Seiko is a member of LWG and aims to increase the percentage of leather produced by LWG-certified tanneries to over 90% in the future.
Case Back
The iconic mark, a symbol of the “DATSUN”, is engraved on the case back.
The words “LIMITED EDITION” and the serial number are applied on the case back.
Seiko Prospex Speedtimer Mechanical Datsun 240Z Limited Edition
SPB517
[ Caliber 6R55 ]
Limited edition of 2,500
Available from October 30th, 2025 onwards
Seiko Prospex Speedtimer Mechanical
Seiko Prospex Speedtimer
Mechanical Chronograph
Datsun 240Z Limited Edition
Case
The new case is produced using Seiko’s latest watchmaking technologies to create a classic and refined construction.
The case feature hairline and polished finishing.
The hammer-shaped push buttons used to operate the stopwatch function provide high operability.
Case Back
Datsun 240Z logo which is based on the emblem on the rally car is engraved on the case back.
The words "LIMITED EDITION" and the serial number are applied on the case back, making it a special specification high in rarity.
Seiko Prospex Speedtimer Mechanical Chronograph Datsun 240Z Limited Edition
SRQ057
[ Caliber 8R48 ]
Limited edition of 500
Available from October 30th, 2025 onwards
Seiko Prospex Speedtimer Mechanical Chronograph
Seiko Prospex Speedtimer
Solar Chronograph
Datsun 240Z Limited Edition
Case / Bracelet
The bracelet enhances the appearance of the watch and is well matched to the case size for an excellent balance. The center of the bracelet is black with a hard coating in an homage to the bonnet of the Datsun 240Z.
Case Back
The case back is adorned with an original illustration of the winning rally car, Datsun 240Z.
The words "LIMITED EDITION" and the serial number are applied on the case back.
Seiko Prospex Speedtimer Solar Chronograph Datsun 240Z Limited Edition
SSC957
[ Caliber V192 ]
Limited edition of 4,000
Available from October 30th, 2025 onwards
